How Can I Create Percentage-Based CSS Borders Using Only CSS?
Dec 04, 2024 pm 05:29 PMCSS Borders: Setting Thickness in Percentages: A CSS-Only Approach
Although CSS borders do not natively support percentages, there is a clever CSS-only solution for achieving this effect.
Wrapper Element Magic
To simulate percentage borders, use a wrapper element with the following properties:
- Background color: Set the wrapper element's background color to the desired border color.
- Padding: Set the wrapper element's padding in percentages to create the border width illusion.
- Element background color: Set the background color of the element within the wrapper to the desired color (transparent or otherwise).
Example Code:
To demonstrate, here's HTML and CSS code to create an element with 25% width side "borders":
HTML:
<div class="faux-borders"> <div class="content"> This is the element to have percentage borders. </div> </div>
CSS:
.faux-borders { background-color: #f00; padding: 1px 25%; /* set padding to simulate border */ } .content { background-color: #fff; }
This technique mimics percentage borders by using padding on a wrapper element to create the illusion.
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